Carmex 16ER18UNMXC/G Threading Insert 18 Tpi 3/8 in External Un

Product Description

The CARMEX 16ER18UNMXC/G is a laydown threading insert designed for external UN thread cutting at 18 threads per inch (TPI). Manufactured from solid carbide with a micrograin substrate, this insert carries a PVD-applied TiN coating for wear resistance and longer tool life. It features a 3/8 inch inscribed circle, a thickness of 0.146 inches, and a 60-degree included angle standard to UN thread profiles. The right-hand orientation suits conventional external threading operations on CNC lathes and manual turning centers. Machinists and toolroom technicians install this insert into compatible 16ER toolholders for single-point threading passes on a range of workpiece materials.

This insert is suited for external UN threading applications across residential, commercial, and industrial machining environments. Its universal primary workpiece material rating makes it applicable across steel, stainless steel, cast iron, non-ferrous metals, high-temperature alloys, and other common turned materials. Typical use cases include threading fastener blanks, fittings, and hydraulic components on production or job-shop turning equipment. The MXC grade designation indicates CARMEX micrograin carbide construction optimized for threading consistency and edge integrity.

Key Features

• Solid carbide micrograin substrate for edge stability in threading applications
• PVD TiN coating applied for improved wear resistance and surface finish on the thread form
• 18 TPI UN thread standard with 60-degree included angle for precise unified national thread form
• 3/8 inch inscribed circle (0.3750 inches) fits standard 16ER toolholder pockets
• Right-hand external orientation for conventional single-point threading cuts
• Universal workpiece material compatibility covering steel, stainless, cast iron, non-ferrous, and superalloys

Compatibility

Designed for use in 16ER-style laydown threading toolholders. Consult your toolholder manufacturer specifications to confirm pocket geometry and clamping compatibility before installation.

Installation Notes

This insert is installed by a machinist or toolroom technician into a compatible 16ER threading toolholder. Power down and lock out the turning machine before changing inserts. Use the appropriate torx or hex key to secure the clamping screw to the toolholder manufacturer recommended procedure - do not overtighten. Verify thread form and pitch with a thread gauge after the first pass before committing to full production runs.